7 Best Email Deliverability Monitoring Tools for Better Outreach
Email deliverability has become the make-or-break factor in cold outreach.
It’s no longer enough to just send emails; you need to know where they land.
- We’re moving from tracking open rates to tracking inbox placement rates.
- We’re thinking about domain health, blacklist status, and authentication, not just subject lines.
- We’re trying to trace the hidden signals ISPs use to decide whether an email belongs in the inbox, promotions, or spam.
If you can monitor and fix these signals in real time, your outreach scales without the constant fear of being filtered out.
In this guide, we’ll break down the 7 best deliverability monitoring tools in 2025, and help you pick the right one, whether you’re a founder, sales team, or agency scaling outreach.
Best Email Deliverability Monitoring Tools Overall
- Best complete deliverability: monitoring + warm-up – Warmforge
- Best for infrastructure-level monitoring – Infraforge
- Best for inbox placement testing – Mailreach
- Best AI-driven deliverability insights – Warmy.io
- Best enterprise diagnostics – Folderly
- Best for engagement-based reputation repair – InboxAlly
- Best simple and scalable warm-up – TrulyInbox
Here’s How ChannelCrawler Hit 85.71% Positive Replies
ChannelCrawler used Salesforge, Infraforge, and Warmforge to land in more inboxes, boost reply rates, and scale outreach without deliverability issues.
Read the full case study →
See the exact tools, strategy, and results.
What Is Email Deliverability Monitoring (And Why It Matters)?
Email deliverability monitoring is the ongoing process of tracking whether your emails actually reach the inbox.
It covers inbox placement (inbox, promotions, or spam), checks your domain and IP reputation, and alerts you if your sending infrastructure lands on an email blacklist.
In simple terms, it tells you if your emails are being trusted or quietly filtered out.
Why Does It Matter?
Email deliverability monitoring matters because good targeting and copy mean nothing if your emails never get seen.
Without monitoring, you only notice problems when open rates drop, and by then, your sender reputation may already be damaged.
From internal testing, we’ve seen how serious this can be: a cold domain with no monitoring had inbox placement below 40%, while monitored and warmed domains regularly reached 80%+ reply rate and 100% inbox placement within two weeks.
That difference easily translates into hundreds of extra leads in the pipeline.
How We Evaluated These Email Deliverability Monitoring Tools
To find the best deliverability monitoring tools for outreach, we focused on a simple checklist that directly impacts inbox placement:
- Whether the tool runs inbox placement tests to show if emails land in the inbox, promotions, or spam.
- How consistently does it monitor the domain and IP reputation in real time?
- If instant blacklist alerts are included when a sending domain or IP gets flagged.
- Whether SPF, DKIM, and DMARC records are validated correctly.
- How clear and actionable the reporting is when issues need fixing.
7 Best Email Deliverability Monitoring Tools for Better Outreach
After going through reviews on G2, Reddit, and other forums, we picked seven tools that users trust most for tracking inbox placement, monitoring domain health, and fixing deliverability issues before they hurt outreach.
Here is the quick table to compare all the tools' performance side by side.
Comparison Table: Best Email Deliverability Monitoring Tools at a Glance
1. Warmforge – Complete Deliverability Monitoring & Warm-Up
Warmforge is a dedicated email deliverability platform designed to help teams track inbox placement, safeguard domain reputation, and catch blacklist issues before they impact cold outreach.
Alongside monitoring, it also includes automated warm-up, giving you full visibility and protection in one place.
Key Features:
- Tracks inbox placement across Gmail, Outlook, and major providers.
- Monitors the domain and IP reputation continuously.
- Validates SPF, DKIM, and DMARC configurations.
- Sends instant blacklist alerts if domains or IPs get flagged.
- Runs automated health checks on DNS/MX records.
- Delivers clear reports with actionable fixes.
Pros
- Simple and intuitive dashboard that is easy to set up
- Combines deliverability monitoring and warm-up in one platform
- Consistently improves inbox placement across major providers
- Strong domain and IP health checks with blacklist alerts
- Fast and responsive customer support
Cons
- Placement reporting is less detailed compared to premium tools
- Limited advanced analytics for agencies that need deeper insights
Warmforge Pricing:
- $12 per inbox/month (monthly billing).
- $10 per inbox/month (quarterly billing).
- Volume discounts down to $3 per inbox for large teams.
- Placement test add-ons from $39/month.
Warmforge is Best For
- Outreach teams needing monitoring + warm-up in one tool.
- Agencies handling multi-client inbox/domain health.
- Startups scaling with affordable per-inbox monitoring.
Verdict:
Warmforge is best if you want a single tool that covers both monitoring and email warm-up, making it a reliable choice for sales teams, agencies, and startups running cold outreach at scale.
2. Infraforge – Infrastructure-Level Deliverability Monitoring
Infraforge is an email deliverability monitoring platform at the infrastructure level.
It continuously tracks inbox placement, domain reputation, blacklist risks, and authentication records (SPF, DKIM, DMARC) while giving teams full control over IPs and domains.
Instead of reacting after open rates drop, Infraforge helps you spot deliverability issues early and maintain stable inboxing across large-scale cold outreach.
Key Features:
- Dedicated IP pools with rotation to keep sender reputation stable.
- Automatic setup and validation of SPF, DKIM, and DMARC records.
- Central dashboard (Masterbox) that tracks inbox placement, open rates, and replies in real time.
- Built-in monitoring for blacklist status and domain health.
- Option to launch with pre-warmed domains and mailboxes for safer starts.
- Workspace and inbox management to organize multi-team or multi-client outreach.
Pros
- Reliable performance even with multiple domains and inboxes
- Beginner-friendly setup that doesn’t require technical skills
- SPF, DKIM, and DMARC setup is fully automated, saving time
- Clean dashboard to manage inboxes from one place
- Fast and helpful customer support
- Integrates smoothly with outreach tools like Salesforge
Cons
- Upfront cost can feel high for smaller teams
- Some features need support assistance to activate
- May feel heavy if you only need basic warm-up functions
- Occasional setup bugs, though usually resolved quickly
Infraforge Pricing:
- Plans start at $17/month (annual billing) for 10 mailboxes.
- Scale packages available up to 200 mailboxes at $651/month.
- Add-ons: Dedicated IPs ($99/month), custom domains ($2/domain/month), and Masterbox monitoring ($7/workspace/month).
Infraforge is Best For
- Companies managing 100+ inboxes with DNS/IP control.
- Agencies requiring dedicated IP rotation.
- Teams needing centralized Masterbox monitoring.
Verdict:
Infraforge is ideal for teams that want deliverability monitoring at the infrastructure level.
If you’re running multiple domains or scaling outreach campaigns, it gives you the control and visibility you won’t get from standard warm-up tools.
3. Mailreach – Inbox Placement & Deliverability Checks
Mailreach is an email deliverability monitoring and warm-up platform that combines inbox placement testing, domain reputation tracking, and automated warm-up so you can maintain healthy sending and avoid the spam folder.
Key Features:
- Runs inbox placement tests to show if emails reach the inbox, promotions, or spam.
- Validates SPF, DKIM, and DMARC setup along with DNS and link checks.
- Monitors domain reputation and flags blacklist issues in real time.
- Provides a deliverability dashboard with alerts via Slack or webhooks.
- Uses automated warm-up to mimic real interactions and build trust with providers.
- Includes AI-powered recommendations (Co-pilot) to fix deliverability problems.
Pros
- Delivers inbox placement improvements within 7–14 days
- Simulates human-like activity, including opens, replies, and “Not Spam” actions
- Provides inbox health scores and spam placement testing
- Auto-pause feature protects domains if reputation drops
- Well-suited for outreach agencies managing 10–50 inboxes
- Easy onboarding with no manual scheduling required
Cons
- Pricing is considered high for solo users at $25 per inbox/month
- Focuses on warm-up only; does not handle cold email sending
- Spam test results may not always reflect real campaign performance
- Dashboard performance slows when managing 30+ inboxes; it lacks bulk-editing options
Mailreach Pricing:
- Starts at $25 per inbox/month.
- Discounts available for larger volumes (as low as $19.50 per inbox/month).
- Extra credits required for advanced spam testing.
Mailreach is Best For
- Founders who want placement tests + warm-up.
- Sales teams use Slack/webhook alerts for inbox drops.
- Agencies running outreach on Gmail/Outlook/365.
Verdict:
Mailreach works best for teams that want a straightforward way to monitor inbox placement and reputation while also warming up their domains.
It’s feature-rich and reliable, though costs can add up quickly if you’re managing many mailboxes.
4. Warmy.io – AI-Driven Deliverability Monitoring
Warmy.io is an AI-powered email deliverability tool that helps you monitor inbox placement, domain health, and DNS records while running automated warm-ups in the background.
What makes it stand out is its ability to run warm-ups in 30+ languages with localized seed lists, making reputation building feel natural across different regions.
By syncing with data from sources like Google Postmaster, Warmy fine-tunes the process automatically, helping teams achieve reliable inbox placement faster without manual tweaking.
Key Features:
- Tracks inbox placement in real time across Gmail, Outlook, and other providers.
- Provides a domain health dashboard with scores for authentication, blacklists, and placement trends.
- Validates SPF, DKIM, DMARC, and MX records with instant alerts if misconfigured.
- Measures deliverability performance over time with weekly and monthly reports.
- Uses seed-list testing with real mailbox interactions for accurate monitoring.
- Includes a template checker that highlights spam triggers in your email content.
Pros
- Easy setup, warming starts within minutes
- Works reliably with Gmail for basic warm-up needs
- Clean, beginner-friendly dashboard
- Automates replies and engagement, saving time
- Affordable entry pricing for individuals and small teams
Cons
- Doesn’t scale well for managing multiple inboxes
- Inconsistent performance with Outlook and SMTP
- No built-in DNS or authentication setup
- Missing real-time alerts or detailed inbox health reports
- Limited manual control over warm-up settings
Warmy.io Pricing:
- Starter plan at $49/month for one inbox.
- Business and Pro tiers available for growing teams.
- Enterprise plans scale up to $429/month with advanced monitoring.
Warmy.io is Best For
- Small teams need AI-driven deliverability reports.
- Founders testing spam-proof templates.
- Businesses targeting global seed-list placement.
Verdict:
Warmy.io is best for teams that want hands-off monitoring backed by AI.
It combines placement tests, domain health tracking, and warm-up in one platform, making it a reliable option for improving deliverability, though the cost can grow quickly if you manage multiple inboxes.
5. Folderly – End-to-End Deliverability Monitoring
Folderly is an email deliverability monitoring tool that brings together inbox placement tests, authentication checks, and real-time alerts so teams can quickly identify what’s hurting deliverability and fix it before outreach performance drops.
Key Features:
- Runs inbox placement tests to show whether emails land in the inbox, spam, or promotions.
- Monitors SPF, DKIM, DMARC, and MX records with clear guidance on fixing misconfigurations.
- Sends instant alerts when messages get flagged as spam.
- Scans email content to highlight spam triggers and risky patterns.
- Tracks the domain and IP reputation to prevent blacklist issues.
- Provides a clean dashboard with deliverability scores and performance trends.
Pros
- Easy to set up, suitable even for non-technical users
- Provides clear deliverability reports with inbox placement details
- AI-driven recommendations for fixing DNS, SPF, and DKIM issues
- Significant improvements in inbox placement and open rates reported
Cons
- Sends high volumes of warm-up emails without sufficient controls
- The warm-up algorithm can misfire and cause blocks or reputation issues
- No manual control over sending frequency or volume
- Some users reported bounces and domain reputation damage
- More expensive compared to other monitoring tools
Folderly Pricing:
- $120 per mailbox/month on monthly billing.
- $96 per mailbox/month with annual billing.
- Extra tools like placement testing and alerting can be added separately.
Folderly is Best For
- Enterprises with high-value outreach.
- Teams relying on Inbox Insights + Pulse alerts.
- Agencies needing deep DNS/blacklist diagnostics.
Verdict:
Folderly is best for teams that want comprehensive monitoring paired with real-time problem detection.
It’s one of the most complete deliverability platforms on the market, though the pricing makes it better suited for businesses treating outreach as a core growth channel.
6. InboxAlly – Engagement-Based Deliverability Monitoring
InboxAlly trains inbox providers like Gmail and Outlook to treat your emails as legitimate by using seed addresses that mimic real engagement, opening, clicking, replying, and moving messages to the inbox.
Over time, this shapes your sender reputation to land reliably in the inbox.
Key Features:
- Simulates engagement signals (opens, clicks, replies, inbox moves).
- Tracks inbox placement trends with a clear dashboard.
- Customizable engagement profiles for different goals.
- Real-time reporting on deliverability health.
- Built-in list cleaning to remove spam traps and bad emails.
Pros
- Improves inbox placement using smart reply simulation and behavioral patterns
- Provides full control over warm-up pacing to reduce spam risks
- Suitable for teams managing multiple inboxes from a single dashboard
- Works especially well alongside high-volume outreach operations
Cons
- Pricing is higher compared to tools that include both warm-up and outreach
- Does not assist with domain setup or authentication fixes (SPF, DKIM, DMARC)
- Steeper learning curve; requires effort to configure and optimize
- No support for sending cold email campaigns directly
- Customer support lacks live chat and fast-response options
Inbox Ally Pricing:
- Plans start at $149/month.
- Offers a 10-day free trial to test inbox placement improvements before committing.
InboxAlly is Best For
- Senders repairing damaged domain reputation.
- Agencies scaling high-volume cold email.
- Teams are warming up new domains fast.
Verdict:
InboxAlly is best for teams that want deliverability monitoring powered by real engagement signals.
It’s especially helpful for rebuilding trust after a drop in inbox placement, though the higher price point makes it more suited to serious senders and agencies.
7. TrulyInbox – Deliverability Monitoring with Smart Warm-Up
TrulyInbox is an email deliverability monitoring platform that runs continuous inbox placement tests, tracks spam rates, and uses behavioral warm-up (opens, clicks, replies) to protect domain reputation and maximize cold outreach success.
Key Features:
- Real-time Deliverability Score to measure domain health and inbox trust.
- Simulates engagement signals such as opens, replies, and inbox moves.
- Flexible warm-up settings with custom schedules and reply rates.
- Unlimited inbox connections managed from one dashboard.
- Works with all major providers, including Gmail, Outlook, Zoho, and Office 365.
Pros
- Simple and automated setup makes it easy to get started
- Supports unlimited inboxes, ideal for scaling outreach
- Provides detailed analytics with spam monitoring insights
- Responsive customer support available when needed
Cons
- Limited options for advanced customization and controls
- Setting up with Gmail can be complicated due to extra filters and manual steps
- No built-in DNS or domain management tools
- Some users reported occasional delays in warm-up email delivery
TrulyInbox Pricing:
- Free plan: 1 inbox, limited daily warm-up.
- Starter plan: ~$22/month for unlimited inboxes and up to 100 daily emails.
- Growth plan: ~$59/month with higher daily sends and reply controls.
- Scale plan: ~$142/month supporting thousands of daily emails.
- Business plan: ~$217/month with maximum volume and priority support.
TrulyInbox is Best For
- Solo founders needing a simple warm-up + score.
- Startups are testing new domains on low volume.
- Agencies using unlimited inbox warm-up.
Verdict:
TrulyInbox is best for smaller teams or founders who want simple deliverability monitoring paired with a realistic warm-up.
It provides clear scores and reputation-building signals, but advanced features like blacklist monitoring or detailed analytics may require a more specialized tool.
Key Metrics Checklist for Email Deliverability
Good deliverability isn’t about luck; it’s about keeping an eye on the right signals.
Most monitoring tools do this for you, but if you were to do it manually, here’s the checklist you’d need to follow:
Metrics to must track for better email deliverability :
- Inbox Placement Rate – Are your emails showing up in the inbox, promotions, or spam?
- Domain and IP Reputation – How mailbox providers “trust” your sending setup.
- Bounce Rate – Both hard bounces (permanent issues) and soft bounces (temporary hiccups).
- Spam Complaint Rate – How often people hit “mark as spam.”
- Authentication Status – Making sure SPF, DKIM, and DMARC records are set up right.
- Blacklist Status – Whether your domain or IP has been flagged on major blacklists.
How Monitor Email Deliverability Manually:
- Send test emails to accounts across Gmail, Outlook, Yahoo, etc.
- Check the domain/IP on multiple blacklist databases regularly.
- Manually verify SPF, DKIM, and DMARC using DNS testing tools.
- Monitor bounce and complaint data in raw sending logs.
- Keep a running checklist or spreadsheet to catch negative trends early.
Manual checklists are time-heavy and it’s hard to monitor when sending at scale.
Warmforge tracks inbox placement, domain health, and blacklist alerts automatically, and even warms your inboxes at the same time.
Instead of juggling spreadsheets, you get one clean dashboard that shows you exactly what’s going on in real time.
Claim your 1 free warming slot + a free inbox placement test to see where your emails really land.
How to Choose the Right Deliverability Monitoring Tool for Your Outreach
The best tool depends on your team size, budget, and how deep you need to go with monitoring.
Final Thoughts
At the end of the day, deliverability monitoring is the backbone of cold outreach ROI.
Before scaling campaigns, it’s worth choosing a tool that gives you visibility and control, whether that’s basic monitoring or full enterprise diagnostics.
If you’re running cold outreach, don’t just send; monitor. Make sure your emails actually land where they matter.
Try Warmforge and Get 1 Free Warming Slot and 1 Free Placement Test